87266831085 has 160 divisors (see below), whose sum is σ = 190148808960. Its totient is φ = 37378050048.

The previous prime is 87266831027. The next prime is 87266831137. The reversal of 87266831085 is 58013866278.

It is not a de Polignac number, because 87266831085 - 2⁶ = 87266831021 is a prime.

It is a super-4 number, since 4×87266831085⁴ (a number of 45 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 11032702 + ... + 11040608.

It is an arithmetic number, because the mean of its divisors is an integer number (1188430056).

Almost surely, 2^87266831085 is an apocalyptic number.

87266831085 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

87266831085 is an abundant number, since it is smaller than the sum of its proper divisors (102881977875).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87266831085 is a wasteful number, since it uses less digits than its factorization.

87266831085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8177 (or 8168 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 54.

The spelling of 87266831085 in words is "eighty-seven billion, two hundred sixty-six million, eight hundred thirty-one thousand, eighty-five".